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(No Model.)

H. M. BRINKMAN. BBBB 0R FORMING BARS POR GULTIVATOR TBETH.

No. 459,357. Patented Sept. 8, 1891.

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Pitt g- UNrrn STATES ATENT Prion.

HERMAN M. BRINKMAN, OF KALAMAZOO, MICHIGAN, ASSIGNOR TO THE HARROVSPRING COMPANY, OF SAME PLACE.

DIE FOR FORMING BA'RS FOR CULTIVATOR-TEETH.

SPECIFICATION forming part of Letters Patent No. 459,357, datedSeptember 8, i891. Application led-Aplil 20,1891. Serial No. 389,667.(No model.)

Be it known that I, HERMAN M. BRINKMAN, a citizen of the United States,residing at Kalamazoo, county of Kalamazoo, State of Michigan, haveinvented a new and useful Die for Forming Bars, of which the followingis a specification.

This invention has for its object the belowdescribed and claimedconstruction of dies, which are adapted to form peculiarly-shaped barsfor harrow or cultivator teeth, to which bars said teeth are to beattached.

In the drawings forming part of this specification, Figure l is a planview of an upper and lower die employed in two of the operations informing said bars. Fig. 2 is a section on line 3 3 in Figs. l, 4, and 5,showing the operation. Fig. 3 is a section on line 4 4 in said Figs. l,4, and 5, further illustrating the operation. Figs. 4 and 5 shows thebar in elevation, showing its different shapes. Fig. 6 shows a plan viewof an upper and lower supplemental die employed in the operation, andwhich will vbe described below in connection with the rest of thedescription. Fig. 7 is a section of the dies in Fig. 6, taken on dottedline 6 6 in Fig. 8. Fig. Sis a section taken on dotted line 5 5 in Fig.7, and 9 shows the complete bar with a share attached.

Referring to the lettered paris of the drawings, A represents a dieprovided with a rib e, with a flat. surface each side and at each end ofsaid rib, said flat end surfaces being ou a level with the top of therib, and of course the side surfaces being below and a raised shelf ctat one side.

At B is shown the upper die, having a concaved portion or groove fi,which, when in use, tits over the rib c of the die A. The upper die Bhas a flat portion ct', which, when the dies are in use, is directlyover the shelf or flat portion a of the die A. At one end of the lowerdie A is a plate r, having a hole therethrough adapted to receive thepunchl E, which punch is carried by die B, and passed down through saidhole and enters the punchdie F in said end of the die A during theoperation, iu order to punch a hole through the end o of thecultivator-tooth bar, said bar bethe die A in the relationship shown inFig. 2:

A iiat bar of metal is placed on the die A directly over 'the rib e andextending beneath the punch-hole in plate r and over the hole `in thepunch-die F, said die F being in the end. of the die A. Pressure is thenbrought to bear upon die B, which forces said die in contact with die A,forming a portion of the bar in U shape, as illustrated in Fig. 2.Ordinarily the die B is then raised and the bent portion of the bar islaidou the shelf a, the straight portions of said bar being inserted ingrooves w, formed in each end of the shelf a, as shown in Fig. l, Fig. 3showing the end o of the bar in one of said grooves. Pressure of thedies is then brought to bear upon the bar, which flattens the U-shapedpart of thel bar and presses the sides together, as shown at .c in Fig.2. In Fig. 2 these two operations are shown as being performed at onetime, which might be done in some instances; but ordinariiy, as stated,the groove z' and rib e first form the barin U shape under one pressure,and then the same bar is laid upon the shelf Ct and pressed togetherunder another pressure. After these two operations have taken place thebar is bent into a curved shape, as illustrated in Figs. S and 9, inorder to adapt it to the special use in connection withcultivator-teeth. This latter operation of curving the bar isaccomplished by means ofthe dies C D, one of. them O being provided witha square groove longitudinally convex to receive the upset portion ofthe bar in an edgewise manner, as shown in Fig. 7. At the end of thisgroove 'Lt the dies are made curving, the curvature of one of the diesrunning parallel with the other, as shown at Fig. S. The upper die D isprovided with a shoulder c, projecting downwardly toward the groove u atone end of said groove, in order to form an offset to conform to theshape of the cultivator-tooth at the point win Fig. 9. Thus by means ofthe dies C D the bar is given a gen- `eral curvature desired for itsparticular use.

In other uses in cultivators the bar might be left in the condition itis in when treated by the dies A B; but for the special use referred to,which need not be particularly described, the bar should be also treatedby the dies C D.

While I have referred to the dies as upper and lower, of course it willbe understood that they may operate side by side and move laterally, orthe order here shown reversed.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. Dies for shaping cultivator-bars, consisting of one die having alongitudinal rib endwise between two flat surfaces on a plane with theupper edge of said rib, and a shelf at one side having grooves in eachend parallel with said rib, and another die having a groove adapted toregister with the rib of the other die, and a flat surface adapted toregister with the shelf of the latter-named die, substantially as setforth.

2. Dies for shaping cultivator-bars, consisting of one die having alongitudinal rib endwise between two flat surfaces on a plane with theupper edge of said rib, and a shelf at onel side having grooves kin eachend parallel with said rib, and another die having a groove adapted toregister with the rib of the other die, and a iiat surface adapted toregister with the shelf of the latter-named die,

one of said dies being provided with a punchhole at oneend on a linewith said rib, and the other die being provided with a punch in positionto register with said hole, substantially as set forth.

3. The combination of dies for shaping cultivator-bars, consisting` ofone die having a llongitudinal rib endwise between two fiat surfaces ona plane with the upper edge of said rib, and a shelf at one side havinggrooves in each end parallel with said rib, and another die having agroove adapted to register with the rib of the other die, and a flatsurface adapted to register with the shelf of the latter-named die, andtwo other dies having longitudinal registering-surfaces, one of which isconvex and the other concave, the die having the concave surface alsobeing provided with a square groove between its two ends, substantiallyas set forth.

et. Dies for curving a bar longitudinally, a portion of which bar hasbeenl folded edgewise upon itself, consisting of a die having alongitudinal concave surface with a groove between its two ends and adie having a longitudinal convex surface provided with a shoulder oroffset near one end of said groove, substantially as set. forth.

In testimony to the foregoing I have hereunto subscribed my name in thepresence of two witnesses.

HERMAN M. BRINKMAN.

Witnesses:

W. P. BURDICK, A. R. TROWBRIDGE.

